Customer Feedback Portal - Ask customers what you should build next
Software Product Management Stack - Resources & tools to help you manage your software product
Feedback Fish - Collect feedback & make your customers happy.
The Product Management guide - A book on how to create and ship products that people love
Canny - Canny helps you collect and organize feature requests to better understand customer needs and prioritize your roadmap.
Product Management Exercises - A repository of product manager job interview exercises